<?php

header("Content-Type: text/html; charset=utf-8");


require_once 'db_conn.php';
$conn;


$sql = "select * from t_message";
$result = $conn->query($sql);
echo "<pre>";
//print_r($result->fetch_assoc());
$rows = $result->fetch_all(MYSQLI_ASSOC);
print_r($rows);
foreach ($rows as $value) {
    echo "<br/>";
    echo $value["username"]." 说：".$value["content"];
}